Reduced pulsation tapered ramp pump head
First Claim
Patent Images
1. A peristaltic pump comprising:
- assembly head means for supporting a plurality of rollers, said rollers being mounted in an arcuate pattern about an assembly head axis, each roller having a rotation axis generally parallel to the assembly head axis;
a collapsible and resilient tube;
housing means for rotatably mounting said assembly head and for guiding the collapsible and resilient tube over said rollers;
a pump arm having an arcuate surface and mounted to said housing means in a position enabling said rollers to compress the tube against the arcuate surface as the assembly head is rotated, said arcuate surface being shaped and positioned with respect to said assembly head so that as the assembly head is rotated, each roller successively contacts the tube and gradually seals the tube during approximately a 45°
rotation of the assembly head, said pump arm being pivotally mounted to said housing means; and
means for rigidly positioning and locking the pump arm in a closed position enabling said rollers to compress the tube against the arcuate surface.
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Abstract
A peristaltic pump includes a plurality of rollers for compressing and sealing a collapsible and resilient tube. A housing and a pump arm with a specific arcuate surface and position with respect to the housing enable the succesive contact and gradual compression of the rollers with the tube in a manner for moving a fluid through the tube in one direction without creating substantial fluid back pressure in an opposite direction.
218 Citations
8 Claims
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1. A peristaltic pump comprising:
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assembly head means for supporting a plurality of rollers, said rollers being mounted in an arcuate pattern about an assembly head axis, each roller having a rotation axis generally parallel to the assembly head axis; a collapsible and resilient tube; housing means for rotatably mounting said assembly head and for guiding the collapsible and resilient tube over said rollers; a pump arm having an arcuate surface and mounted to said housing means in a position enabling said rollers to compress the tube against the arcuate surface as the assembly head is rotated, said arcuate surface being shaped and positioned with respect to said assembly head so that as the assembly head is rotated, each roller successively contacts the tube and gradually seals the tube during approximately a 45°
rotation of the assembly head, said pump arm being pivotally mounted to said housing means; andmeans for rigidly positioning and locking the pump arm in a closed position enabling said rollers to compress the tube against the arcuate surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification